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Accrued Expenses Payable - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Accrued expenses [abstract] |  |
Current portion of provision for return condition | $ 4.9 | $ 2.3
Current portion of provision for maintenance | $ 4.2 | $ 3.5
Accrual expense settlement period | 12 months |

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- Definition Accrual expense settlement period. + References No definition available. + Details
Name: | cpa_AccrualExpenseSettlementPeriod
Namespace Prefix: | cpa_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Accrued expenses. + References No definition available. + Details
Name: | cpa_AccruedExpensesAbstract
Namespace Prefix: | cpa_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Current portion of provision for return condition. + References No definition available. + Details
Name: | cpa_CurrentPortionOfProvisionForReturnCondition
Namespace Prefix: | cpa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition current portion of the provision for maintenance + References No definition available. + Details
Name: | cpa_CurrentPortionOfTheProvisionForMaintenance
Namespace Prefix: | cpa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant